Radio reception device



Feb. 19, 1929. 1,703,260

C. HORTON RADIO RECEPTION DEVICE Filed July 5, 1925 1 2 V =5 3 fll! 7 Wu I /2 l1 a l1 V// W. A.

INVENTOR Charles Hoffa/1 ATTORNEY Patented Feb. 19, 1929.

UNITED STATES PATENT OFFICE.

CHARLES HORTON, OF RIDGEFIELD PARK, NEW JERSEY, ASSIGNOR TO THE PILOT ELECTRIC MANUFACTURING COMPANY, INC, OF BROOKLYN, NEW YORK, A COR- PORATION OF NEW YORK.

Application filed July 3,

This invention relates to improvements in radio reception devices being directed particularly to elements cooperating with inductance coils in radio reception devices whereupon the effective inductance of the cqil is reduced.

This invention is particularly directed to a mechanically controlled means cooperating wit-h the inductance coil whereby a noncontinuous independently operable and naturally effective resistance in an absorbing circuit is introduced.

This invention contemplates the control of the effective inductance of the coil independently of the electrical phenomena by which the coil is affected, whereby the oscillations produced in the coil are more or less reduced or affected by the variable resistances introduced inductively in the coil circuit by means of a mechanical vibration of an element supported within the coil.

This invention introduces a novel form of mechanical element consisting of a plurality of loose contacts which loose contacts have passing therethrough an induced current caused by the coil and which induced current passing through these loose contacts cause a variable resistance whereby the absorption within the coil element is more readily controllable.

In general the mechanical. vibrating element. cai'ising this variable resistance acts as a tertiary coil. it fum'tim'ling insomuch as an imluctance coil as that of a variable resistance element due to the particular provision of loose contacts through which the induced current emanating from the secondary of the inductance coil motion of necessity pas.

Among the objects of the invention it is aimed to provide a mechanical element having a plurality of loose contacts thereon. In other WOI't s, mechanical conductors having their extremities free from one another though they may be interconnected at portions along their length; to provide preferably a non solid metallic element in the form of gauze or lo sely wound wires, or interconnected. conducting materials in closely associated planes whereby loose contacts may be nade thereon; to provide a. mechanical element consisting of interconnected conductors having loose contacts directly associated with an inductance coil and positioned therein or adjacent thereto whereby an induced current 1925. Serial No. 41,253.

caused within the coil element is controllable by means of these variable resistances formed by the loose contacts; and to generally pro vide a novel, form of mechanically control lable elements vibrating in a. plane independent of the o,-:cillations of the inductance coil whereby to provide a balanced absorption circuit within a radio circuit.

Specifically it is aimed to provide a movable mechanically vibrating element operable with the inductance coil whereby the induced current set up thereby may be reduced through the variable resistance thereof.

Further it is aimed to provide a novel form of element preferably in the shape of a gauze or loosely wound or independently interconnected wires, forming a movable coil element whereby control of the induced current set up by the secondary may be maintained through the adjustment in various planes of the said element.

Still further it is aimed to provide novel means for controlling the movement of the control element with respect to the secondary of the coil.

These and other advantages, capabilities and features of the invention will appear from the subjoined detailed description of one specific embodiment of the invention as illustrated in the accompanying drawings in which Fig. 1 is a section through the center of an inductam-e clement containing the element forming the subject matter of the invention.

Fig. 2 is a section through the center of an inductance element containing a modified form of thc OlGlP-Gllll forming the subject matter of this invention, and

Fig. 3 is a cross section of an inductance element containing a further modification of the element forming the subject matter of this invention, and

Fig. 4 is a plan View of the element in its support.

Referring particularly to the reference characters in the drawings; numeral 1 represents the insulated support or fran'iework of the inductance element here shown in the form of a cylindrical coil. The primary 2, is wound upon one portion of the frame, the secondary 3, having a greater number of turns, is wound concentrically to the prin'iary along the length of the support. As thus far described, the inductance coil applied in thereof is the well known inductance applied in the radio reception art.

Positioned so as to intercept the inductive oscillatory effect from the secondary coil 8, there is formed a foraminous disc member t, such as the gauze member i comprising a wire cloth of fine mesh, positioned between portions 5 and 6 of a cylindrical supporting member so that the gauze 4 may be displaced by the movement of the support member 7. Inasmuch as the framework of the supporting member is concentric withthe supporting member 1, the displacement thereof can be made by mere frictional movement thereof.

The modification shown in Fig. '2 makes it possible for a continuous control. at the will of the operator. In this modification the frame member 8 is supported at the base member of the radio reception apparatus and has thereon primary coil 10 and secondary 11. The gauze or inductance controlling member 12 consists of a wire gauze supported on a cylindrical hollow casing member 13,

the gauze being fixed permanently thereon by being positioned in a cut out portion 14 thereof. When theoperator wishes to control the inductance of the coil so as to reduce the same he may reciprocate the casin 13 by hand; since the casing is slidable in the opening 15 at the base of the radio reception device.

In the modification shown in Fig. 3 the inductance coil is formed by having a primary 16, and a plurality of secondaries 17 and 17 positioned in parallel relation aboutthe support on the casing member 18.

Apertures 19are formed at diagrammati cally opposite points from 18 through which there passes a shaft member 20. This shaft member carries the inductance controlling device 21, which in this case is directed particularly to an GIHlOOCllDlQHt of the invention consisting of a wire gauze. This shaft member 20 is controlled for rotation from a point exterior of the radio reception device in which this coil 18 is contained, whereby motion thereof will rotate the inductancecontrolling member 21 about a horizontal axis. In this manner this inductance controlling element having its definite mechanical vi bration, will control the inductance of the coil with respect to the oscillations produced in the coil.

Fig. 4 merely shows .a theoretical graphical outline of the path of the induced oscillations from the secondary coil through the induc tance controlling member or gauze member at, which, gauze has a mechanical period of vibration and which act. as a sort of a tertiary coil. The induced oscillations passing along oneplane and along independent strand 22' comes to a loose contact at 28 but'wherein the s rand 24 intercepts strand'22. At this point part of the loose contact between the loose strands 22 and 24 will cause a variable resistance with the mechanical vibration element 4. Likewise a second loose contact is caused at the junction of strand 24 with strand 25; the junction of strand 25 with strand 26 and the junction oi strand 26 with strand 22, so that there are a plurality of loose contacts having an induced current therethrough, which induced current originates inthe secondary coil.

Inasmuch as the element 4, herein indicated as a gauzeelement, has independent period of vibration, due to the vibrations imparted to the receiver, and all the mechanical. elements contained therein, caused by vibrations and. movements within the home in which such radio receivers are kept, it itself produces a. variable resistance so that the absorption within the coil element is controllable and varied from the normal electrical periodic oscillations of the inductance coil.

Though the particular embodiment herein indicated illustrates a wire gauze loose connection, it iswithin the province of the inventor to provide a device consisting of powdered metallic fillings positioned in a con-' tainer' from which a loose mechanical contact may be made whereby the absorption of the oscillatory effect throu h the induction of the secondary coil is absorbed.

It isobvious that various changes and modifications may be made to the details of construction without departing from the general spirit of the invention as set forth in the appended claims.

What I claim is V 1. In a radio reception device, t 1e combina tion with inductance means, of a variable resistance element comprising a foraminous disc positioned within said inductancemeans, said element having a series of interconnecter wires forming loose contacts therebctween and being capable of absorbing power in variable amounts whereby to prevent oscil lation in said reception devices.

2. In a. radio reception device, the combination with inductance means, consisting of primary and secondary coils, of an independent mechanical resistance element cooperating therewith, said element comprising foraminous disc consisting of iron wire cloth, and said element having interconnected portions forming loose contacts and being movable with respect to the secondary coil and capable of absorbing power in variable amounts, therefrom whereby to prevent oscillation in said reception devices.

3. In a radio reception device, the combination with inductance means, of a metallic foraminous element having a nechanical period of vibration and cooperating with said inductance means, said element comprising a series ofangularly displaced and loosely contacting wire strands and being capable of absorbing power in variableamounts from said inductance means, whereby to preventoscillation in said radio reception devices.

4. In a radio reception device, in combination with inductance means of an element having a mechanical period of vibration and forming a resistance in a radio reception device, said element comprising a foraminous disc and consisting of a plurality of interconnected conductors forming" loose contacts at their points of crossing and capable of absorbing power in variable amounts from said inductance means, whereby to prevent oscillation in said radio reception devices.

CHARLES HORTON. 

